The Effects of Alcohol vs. Caffeine on Water Flea ’s Heart Rate. Title Page Abstract For our most recent experiment we tested the effects of immersing water fleas in caffeine and alcohol to see the effects on their heart rate. Before the experiment we hypothesized that if you place the water fleas in alcohol then their heart rate will slow down‚ and if you place them in caffeine then their heart rate will raise. For this experiment we needed water fleas‚ tap water‚ two pipettes
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with cover slip in order to examine its heartbeat by using the microscope. Aim In this Lab we will study the effect of different concentrations of adrenalin on the heart rate daphnia‚ the water flea. It is expected to recognize a threshold of the daphnia in its reaction the three different adrenalin concentrations‚ in terms of heart rate. Background The endocrine system works with the nervous system to regulate and coordinate body functions. While the nervous system works quickly and sends messages
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through cellular respiration‚ and in turn‚ an athlete would heighten the intensity of the workout for a longer period of time becoming a better athlete. The VO2 Max of a person can be affected by mass‚ time it took to walk necessary distance‚ and heart rate. Each variable is in turn varied be age and gender. The greater the value for VO2 Max the greater the efficiency of the cardiovascular system. VO2 max plays a major role in the aerobic energy system because an increased VO2 max permits more oxygen
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range from 1µ to 50µ. The heart of Daphnia is located dorsally meaning it’s located in the back. The heart rate of Daphnia can range due to many variables‚ one being temperature. "At a temperature averaging 20o C its heart rate is about 200 beats per minute."2 As the temperature surrounding the Daphnia decreases so does its heart rate. Daphnia has a transparent body which allows one to see its organs. This is why Daphnia is often used in experiments dealing with heart rate. Daphnia inhibits regions
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- 2006 RESULTS: In this experiment the effect of different hormones on heart rate of _Daphnia_ was examined. It was investigated which substances act as stimulants and which substances act as depressant. Initially‚ _Daphnia_ was placed on depression slide under the microscope and the average heart rate was determined. Subsequently‚ _Daphnia_ was treated with different type of hormone and the effect on Daphnia heart rate was observed. It was investigated which substances act as stimulants and which
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around the body and play an essential part in providing the horse with its increased need for oxygen during exercise. They allow the musculoskeletal system to use energy to facilitate motion. The cardiovascular system comprises the heart‚ blood vessels and blood. The heart pumps blood around the body via the blood vessels which carry deoxygenated and oxygenated blood to and from the lungs. The red blood cells contain a protein called haemoglobin which binds oxygen and carries it to the muscles. The
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stretching exercises. 2. Practice stepping up onto and down from the step before you begin the test. Each step has four beats: up-up-down-down. Males should perform the test with the metronome set for a rate of 96 beats per minute‚ or 24 steps per minute. Females should set the metronome at 88 beats per minute‚ or 22 steps per minute. 3. Set the metronome at the proper rate. Your instructor or a partner can call out starting and stopping times; otherwise‚ have a clock or watch within easy viewing
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use of caffeine has been related with raised blood pressure‚ restlessness‚ insomnia and anxiety which‚ in the long term‚ can lead to heart and circulation problems. The aim of this experiment is to observe whether caffeine has any significant effect on heart rate. To test this‚ daphnia will be placed in water and then caffeine solution‚ so the difference in heart rates can be compared. Daphnia are small invertebrates that are found in aquatic environments‚ more commonly known as ‘water fleas’. They
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Arrhythmias Arrhythmias are any change from the normal sequence of the electrical impulses in the heart. An arrhythmia is when your heart cannot pump blood effectively. It may happen to fast‚ to slowly‚ or it may happen erratically. When arrhythmias occur; the lungs‚ brain‚ and other organs cannot work properly and they may shut down and be damaged. A normal heart beat is strong‚ muscular pump that is a little larger than a fist and pumps blood continuously through the circulatory system. Arrhythmias
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chemicals on a Daphnia magna’s heart-rate compared to a control (pond water). The different chemicals were caffeine and alcohol. The heart-rate was the main variable in this experiment. The Daphnia’s heart-rate was observed for 15 seconds and then multiplied by 4 to show its heart-rate in one minute. This was repeated 4 times for each chemical. The data was averaged at the conclusion. It was discovered that alcohol acted as a depressant‚ it lowered the heart-rate of the Daphnia in comparison to
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